Vibration absorbing means for outboard motor tillers



April 3o, 1935 F, T, .RGENS y 1,999,694

VIBRATION ABSORBlNG MEANS FOR OUTBOARD MOTOR `TILLERS Filed sept. 14,1955' Bnventor Gttornegt Peieniewpeso, 1935 L 1,999,694

VIBRATION ABSOBING MEANS FQR- Gw- BOARD M OTQR TILLERS Finn T. Irgens,Wauwatosa, Wis., assigner to ut board Motors (.orpoi'ation9 Milwaukee,Wis., a corporation of Michigan Application September 14, 1933, SeriaiNo. @delle 12 Claims. (Cl. MI5-iti) This invention relates to vibrationabsorbing The rubber brake band expander and cushion means for outboardmotor tillers. 35 is disposed between the surfaces 3| and 32 to It isthe principal object of this invention to normally hold the brake band3U in frictional enprovide a novel and improved means for steergagementWith the braking Cylinder 2l The 5 ing an outboard motor, said meanshaving a rubber block 35 is axially apertured at 36 to 5vibration-absorbing and tiller-locking connection receive dowel pin 3l,which is secured to engine between the motor and the tiller. The motoris easing 9 by means oi a pin 39. of the Well known and generally usedtype in Tiller handle Iii is secured to the collar te. which the engineand propeller and shaft hous- This collar is'rotatably mounted on theswivel l ing are rigidly connected to turn as a unit for bracket E3 andis provided with a radially exl0 propelling and steering the boat uponwhich the tending ilange 5b intermediate its ends enclosdevice ismounted. ing the braking cylinder 2|. The flange 5b is More specicallymy invention comprises a provided with an aperture l through which thecushioning and braking connection between an dowel pin 3l passes withoutcontact. The pins outboard motor casing and its supportl socon- 38carried by the collar flange 5@ are spaced to l5 trolled by the tillerthat the motor is yieldably engage loosely the shoulders 33 or 34 of theexfree for torque vibration but islocked against pansible brake band 3@when the handle 45| is steering movement until theA tiller is manipuoperated. lated, the lock being freed by the movementvof When the tilleris manipulated in a normal the tiller in anormal steering operation.direction to change the position of the motor 20 In the drawing: forsteering, one of the pins 38 engages the brake Figure 1 is a fragmentaryside view in elevaband 30 as previously suggested. and the end of tion,partly in vertical section of an outboard the brake band 30 thus engagedWill be forced motor embodying my device. toward the yieldable rubberblock 35 and out i Figure 2 is a plan view in section taken on the offrictional engagement with the braking cyl- 25 line 2-2 of Figure l.inder 2|.. A continued movement of the tiller Figure 3 is a fragmentaryview similar to Fig- Will, through the rubber block 35 andthe dowel ure1 taken on the line 3-3 of Figure 2. pin 31, cause the engine I0 to moveabout its Figure 4 is a detail view taken in horizontal vertical axis inthe same direction that the hansection on the line 4 4 of Figure 1. dle4| is-moved. When the steering movement 30 Figure-5 isadetail view takenin section on the of the tiller ceases, the expansion of bleek 35 line5-5 of Figure 2. will expand the band 30 into contact with drum Likeyparts are identied throughout by the 2| thereby locking the motoragainst further same reference-characters. movement except for themovement produced by The' outboard motor, of which the engine l0 torqueVibration and accommodated by the 35 is shown in Figure 1, is supportedby the drive block 35.1 shaft housing II in which the drive shaft.|2 Theaperture 5l is suiciently large toprevent operates. Disposedlabout thedrive shaft fhousdGWel pm 3l Contacting With the margin thel'eefing is aswivel bracket or support I3 in which Any vibration of the motor casing9 will be trans-- 40 the shaft housing and engine turn for steering.mlted directly through the dowel pin 31 to the 40 The swivel bracket iscarried by parallel ears |4 rubber block 35 and Will be thereinabsorbed. and pivot pin I1 from clamp arm I8. Clamp Whatever vibrationmay pass through the rubber arm Ia has a clamping screw in its outer endfor cushion will be transmitted through the brake attachment to thetransom of a boat, band 30 to the bracket support I3 rather than to Theswivel bracket I3 is provided adjacent its the handle 4i. 45 end 2n witha braking cylinder 2| integral with Thus the handle 4| maybe set to oatupon the and concentric to the axis of the swivel bracket SWVel bracketSleeve I3, being freely movable I3 and the drive shaft housing II Withinthe thereon in either direction to the very limited exbraking cylinder2| is an expansible brake band lent formed by the Clearance between Pins38 30 wanting with the cynnder as hereinafter and shoulders 33 and 34.This clearance relieves 50 mentioned. Brake band 3u is provided at itsends the tiller Who1ly of the torque vibration of the with surfaces 3|and 32 substantially concenengine and associated parts and makes itpostric to clowel pin 31. It is yalso provided with sible for theoperator to maintain his grasp con'- 5 shoulders 33 and 34 with whichpins`38 are entinuously upon the tiller handle with no strain gageable.of any kind. i 5.5A

When the tiller is to be used for steering purposes, it is always actinguponthe dirigible portions of the apparatus through'the rubber cushion,so that even during an actual steering operation the transmission ofvibration from the engine through the tiller will be cushioned.

It isparticularly to be observed that" no special manipulation of thetiller is required for the release of the lock which normally holds themotor fixed upon a given -course. The tiller is simply moved in anormalsteering direction and its initial movement releases the brake band insuch a manner as to free the motor for rotation in the direction inwhich the tiller is moving. The motor still remains locked againstmovement in the opposite direction and as soon as the tiller is releasedthe expansion of the rubber cushion block engages thev band to lock thedirigible parts against movement in either direction, pending furthermanipulation of the tiller.

Thus the rubber block 35 performs a dual function, serving rst as ,ashock absorber yieldably permitting torque vibration of the engine andrelated parts with respect to the bracket and the boat, and serving.secondly as an expander for the brake band which normally locks thedirigible motor parts against any steering movement while permittingthetorque vibration afore It will be recognized by those skilled in the artthat While the construction herein disclosed has particular advantagesand particular significance in the outboard motor art because of theproblem -of torque vibration present in that art, nevertheless thelocking feature automatically effective to hold and control in anydesired position of adjustment has utility wherever it is desired tolock any control in any kind of apparatus.

I claim: s 4. 1. In a device of the character described, the

combination with a swivel bracket and 'a rotate.

rotation of said member, whereby said memberl and said tiller areyieldably connected during manipulation of said member by said tiller.

2. In 'a device of the 'character'described the combination with abearing sleeve and a member rotatable therein, of a brake drum connectedwith the bearing sleeve an expanding brake band tted within said drum,means yieldably tending to separate the ends of said band whereby toexpand said band into frictional engagementnwith said drum, meansestablishing a connection between said member and an intermediateportion of said band expanding means, whereby yieldably to permit ofmovement of said member respect- 'ing said band, and a leverprovidedwith lost motion connections alternatively engageable with therespective ends of said band, whereby to compress said band against saidexpanding means to free said band for movement respecting said drum andyieldably -to transmit motion through said expanding means to saidmember. A

3. In a device of the character described, the combination with abearing sleeve and a brake drum connected therewith, of a memberrotatable in said sleeve, a brake band frictionally engageable with saiddrum, elastic means between the ends of said band and acting thereon ina direction to maintain said frictional engagement, a lever swiveled formovement about said sleeve and provided with. lost motionconnectionsengageable alternatively with the respective ends,

for locking said motor to said support including an,elastic connection'Ito said motor, said elastic connection being effective to maintain saidlock,-

-ing means normally engagedV to position the motor While permitting ofthe oscillation thereof pursuant to torque vibration.

5. In an outboard motor the combination with a swivel bracket therefor,of tiller controlled means for releasably locking saidmotor to saidbracket, said means including complementary lockable parts and anelastic member connected with one of said parts and with said motor,said tiller being connected with said last mentioned part and coupledsolely through said elastic means with said motor.

6. In an outboard motor the combination with a swivel bracket and amotor rotatable therein, of a locking part connected with said -swivelbracket, a tiller provided withI means mounting it for oscilation aboutsaid swivel bracket, a second locking part complementary tothe rst andoperatively connected to be actuated by the tiller, and elastic meansimposed between said last mentioned locking part and the motor, saidtiller being connected to the motor only through said elastic means andlast mentioned part whereby the position of the motor is yieldablydetermined by said last mentioned locking part subject 'to' the controlof the tiller but free for torque Vibration with respect thereto.

'7. In an outboard motor structure, a support,

a motor rotatable on the support, a handle for H rotating Lthe motor,and meansconnecting said handle with the motor and frictionally engag-`ing said support, said means having a resilient connection interposedbetween said handle and said motor.

8. In an outboard motor structure, a support, a motor rotatable on thesupport, a handle 'for rotating the motor, and brake means interposedbetween said handle and motor, said means comprising a friction elementengaging said support, means carried by the handle for withdrawing-saidelement from frictional engagement'` with the support, andresilient means interposed be-` tweensaid friction element and saidmotor.

9. In combination, a support, a member rol connected with said memberwhereby the rotative position of said member yis yieldably iixedby saidelastic means and carrier and band with respectk A to said member andsupport, together with means for engaging an end of said band in adirection to overcome said elastic means and release said yband fromsaid drum for the adjustment ot l,the v angular position of said member.

10. In combination, a bearing, a member ro-v'r' tatable therein, a drumsubstantially concentric 76 with the bearing, a brake band having freeends and applied toI said drum, elastic means between the ends of 'said'band pressing said band into engagement with the drum, the ends Aof saidband having shoulders for engagement in a direction to relieve thepressure oi vsaid; band upon thev drum against the pressure of saidelastic means, a support for the elastic means connected with saidmemberfwhereby the position of said memloer is yieldably. fixed throughsaid eiastic means and band with respect to said drum and bearing, and ahandle having means alternativeiy engageable with the respectiveshoulders of said bami in directions to free said band and member forrotation in either direction with respect to said drum and bearing.

il. An outboard motor ystrlusture comprising the combination with asupporting sleeve, of a motor having a bearing in said sieeve forsupport thereby, a brake drum concentric with said sleeve and connectedtherewith, a handle pivote@ for vmovement about said sieeve and providedwith a iiange comprising a cover for' said drum, a braise band havingfree ends expansibie within said drum for frictional braking engagementtherewith, an elastic block interposed between the 'ree ends of saidband and exerting a band expanding pressure, a support for said loiocirconneoteoi with said motor whereby the position oi' said motor isyieldably determined by saioi loioois anni sand with respect to saiddrumand support. shoulder terminals on said band, and pins connected withfree to vibrate in said position and is unioelred for rotation to a newposition by a normal steering movement et saisi handle.

i2., In an outboard motor structure, the combination with a brake and amotor member rotatabie therein, of a brake band connected with saidmember and ense-semola vwith seid drum, means elasticallyJ forcing saidband, into engage 'ment with the drum, whereh'y automatioaily to iocksaid member in. any given position of adjustment, a tiller for swingingsaid motor for steering purposes, and means iooseiy oormecting saisitiiier with said member and including meehanisrn opposing the action ofsaid elastic means on said brake band, whereby to free saiei'motor forswingins movement preiiminary to the movement thereefiiy said tiiler.

FXNN T. mGENS.

